10s-(2s+9)=-3(15-4s)

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Solution for 10s-(2s+9)=-3(15-4s) equation: 



10s-(2s+9)=-3(15-4s)

We move all terms to the left:

10s-(2s+9)-(-3(15-4s))=0

We add all the numbers together, and all the variables

10s-(2s+9)-(-3(-4s+15))=0

We get rid of parentheses

10s-2s-(-3(-4s+15))-9=0



We calculate terms in parentheses: -(-3(-4s+15)), so:

-3(-4s+15)

We multiply parentheses

12s-45

Back to the equation:

-(12s-45)



We add all the numbers together, and all the variables

8s-(12s-45)-9=0

We get rid of parentheses

8s-12s+45-9=0

We add all the numbers together, and all the variables

-4s+36=0

We move all terms containing s to the left, all other terms to the right

-4s=-36

s=-36/-4

s=+9

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